Truck starts bucking and backfiring going up hill

Tiny
RICHARD GEEHAN
  • MEMBER
  • 1971 CHEVROLET TRUCK
  • 0.5L
  • V8
  • 2WD
  • MANUAL
  • 120,000 MILES
When I go up a big hill on my driveway and it is warm it starts bucking and backfiring.
Friday, December 18th, 2020 AT 3:20 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

I would start with basics such as plugs, wires, cap and rotor to be sure you do not have cross firing.

https://www.2carpros.com/articles/engine-backfires-while-running

https://www.2carpros.com/articles/how-to-change-spark-plugs

Did you change the points and condenser as well?

I would also check the compression as well.

https://www.2carpros.com/articles/how-to-test-engine-compression

Roy
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Friday, December 18th, 2020 AT 3:33 PM

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